APPLIED MATHEMATICS AND COMPUTATION, cilt.232, ss.784-786, 2014 (SCI-Expanded)
We transfer some known univariate Lyapunov-type inequalities to the multivariate setting of a shell via the polar method. Our results are better than some results of Anastassiou (2011) [6] for even-order partial differential equations. (c) 2014 Elsevier Inc. All rights reserved.